Exploració per tema "Artificial satellites--Orbits"

Ara es mostren els items 1-12 de 12

    • Analysis of perturbations and station-keeping requirements in highly-inclined geosynchronous orbits 

      Fantino, Elena; Flores Le Roux, Roberto Maurice; Di Salvo, Alessio; Di Carlo, Marilena (2015)
      Text en actes de congrés
      Accés obert
      There is a demand for communications services at high latitudes that is not well served by conventional geostationary satellites. Alternatives using low-altitude orbits require too large constellations. Other options are ...

    • Attitude estimation of a small satellite using a multi-objective optimization approach 

      Gambon Bru, German (Universitat Politècnica de Catalunya / Imperial College London, 2010)
      Projecte/Treball Final de Carrera
      Accés obert
      This project analyses the performance of a multi-objective optimization approach for the estimation of the rates of rotation of a small satellite, given noisy measurements of the attitude. The performance of this method ...

    • Concepts and applications of aerodynamic attitude and orbital control for spacecraft in very low earth orbit 

      Livadiotti, Sabrina; Crisp, Nicholas H.; Roberts, Peter C.E; García-Almiñana, Daniel; Rodríguez Donaire, Silvia; Sureda Anfres, Miquel (International Astronautical Federation, 2019)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Spacecraft operations below 450km, namely Very Low Earth Orbit (VLEO), can offer significant advantages over traditional low Earth orbits, for example enhanced ground resolution for Earth observation, improved communications ...

    • Demonstration of aerodynamic control manoeuvres in very low earth orbit using SOAR (Satellite for Orbital Aerodynamics Research) 

      Crisp, Nicholas H.; Livadiotti, Sabrina; Roberts, Peter C.E; García-Almiñana, Daniel; Rodríguez Donaire, Silvia; Sureda Anfres, Miquel (International Astronautical Federation, 2019)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Aerodynamic forces have often been proposedas a possible means to perform a variety of different attitude and orbit control manoeuvres in very low Earth orbits including pointing control, constellation and formation ...

    • Geosynchronous inclined orbits for high-latitude communications 

      Fantino, Elena; Flores Le Roux, Roberto Maurice; Di Carlo, Marilena; Di Salvo, Alessio; Cabot Soler, Elisenda (2017-11-01)
      Article
      Accés obert
      We present and discuss a solution to the growing demand for satellite telecommunication coverage in the high-latitude geographical regions (beyond 55°N), where the signal from geostationary satellites is limited or ...

    • KeyNote: DISCOVERER - Making commercial satellite operations in very low earth orbit a reality 

      Roberts, Peter C.E; Crisp, Nicholas H.; Romano, Francesco; García-Almiñana, Daniel; Rodríguez Donaire, Silvia; Sureda Anfres, Miquel (International Astronautical Federation, 2019)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      DISCOVERER is a €5.7M European Commission funded Horizon 2020 project developing technologies to enable commercially-viable sustained-operation of satellites in very low Earth orbits. Why operate closer to the Earth? For ...

    • ROAR - A ground-based experimental facility for orbital aerodynamics research 

      Oiko, Vitor; Roberts, Peter C.E; Worral, Stephen D.; García-Almiñana, Daniel; Rodríguez Donaire, Silvia; Sureda Anfres, Miquel (International Astronautical Federation, 2019)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      DISCOVERER is a European Commission funded project aiming to revolutionise satellite applications in Very Low Earth Orbits (VLEO). The project encompasses many different aspects of the requirements for sustainable operation, ...

    • Sensitivity study of the implementation of Air-Breathing Electric Propulsion systems as atmospheric drag compensation measures Earth Observation CubeSat missions at Very Low Earth Orbits 

      Nadal Vila, Pau (Universitat Politècnica de Catalunya, 2019-09-30)
      Treball Final de Grau
      Accés obert
      Placing a CubeSat in Very Low Earth Orbits can prove to be considerably beneficial for satel-lite imagery missions. To consistently benefit from its advantages though, any satellite insuch orbits must compensate the drag ...

    • SOAR - Satellite for Orbital Aerodynamics Research 

      Crisp, Nicholas H.; Roberts, Peter C.E; Edmonson, Steve; García-Almiñana, Daniel; Rodríguez Donaire, Silvia; Sureda Anfres, Miquel (International Astronautical Federation, 2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      SOAR (Satellite for Orbital Aerodynamics Research) is a CubeSat mission designed to investigate the interaction betweendifferent materials and the atmospheric flow regime in Very Low Earth Orbits (VLEO) and to demonstrate ...

    • Study of end-of-life disposal options for highly-inclined geosynchronous satellites 

      Cabot Costa, Elisabeth (Universitat Politècnica de Catalunya, 2016-06)
      Treball Final de Grau
      Accés obert
      In recent years, the growing volume of activities in the northern regions (Arctic, Canada, Northern Russia) has produced an increasing request for communications services. Several studies have concluded that there are ...

    • Study of Optimization Methods for Space Debris Removal in Low Earth Orbits 

      Sadeghi, Ehsan (Universitat Politècnica de Catalunya, 2019-01)
      Projecte Final de Màster Oficial
      Accés restringit per decisió de l'autor

    • Study of Optimization Methods for Space Debris Removal in Low Earth Orbits 

      Sadegui, Ehsan (Universitat Politècnica de Catalunya, 2019-10-24)
      Projecte Final de Màster Oficial
      Accés restringit per decisió de l'autor
      The develpment of the Master Thesis will include the following tasks:1- Brief review of policies and regulations of Inter-Agency Space Debris Coordination Committee. 2- Study of Orbital Debris Measurements such as ground ...